21803960

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2767}}^1$

素因数の和:2975

約数の個数: 32

約数和(自身を含む): 49325760

約数和(自身を除く): 27521800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2767, 3940, 5534, 7880, 11068, 13835, 22136, 27670, 55340, 110680, 545099, 1090198, 2180396, 2725495, 4360792, 5450990, 10901980, 21803960]

約数ペア:

[(1, 21803960), (2, 10901980), (4, 5450990), (5, 4360792), (8, 2725495), (10, 2180396), (20, 1090198), (40, 545099), (197, 110680), (394, 55340), (788, 27670), (985, 22136), (1576, 13835), (1970, 11068), (2767, 7880), (3940, 5534)]